France-History- ´Brennus mettant son épée dans la balance´ -Brennus or Brennos was a chieftain of the Senones, a Gallic tribe originating from the modern areas of France known as Seine-et-Marne, Loiret, and Yonne, but which had expanded to occupy northern. France-History- ´Brennus mettant son épée dans la balance´ -Brennus or Brennos was a chieftain of the Senones, a Gallic tribe originating from the modern areas of France known as Seine-et-Marne, Loiret, and Yonne, but which had expanded to occ